When sharing a joint
with friends, calling a "power smoke" changes the smoking rhythm. Instead of *puff puff pass* it's simply *puff pass*. Anybody in the circle can call a power smoke at anytime (usually nearing the end of the joint or blunt when it starts to release harsher smoke)
Dude 1: This joint is hitting hard, man. Power smoke.
Dude 2: *takes one hit* *pass*
Dude 3: *takes one hit* *pass*
Dude 1: *takes one hit* *pass*